1; REQUIRES: asserts 2; RUN: opt < %s -S -passes=loop-vectorize -enable-vplan-native-path -vplan-build-stress-test -debug-only=loop-vectorize -disable-output 2>&1 | FileCheck %s 3 4; This test checks that, when stress testing VPlan, if the computed VF 5; is 1, we override it to VF = 4. 6 7; CHECK: LV: VPlan computed VF 1. 8; CHECK: LV: VPlan stress testing: overriding computed VF. 9; CHECK: LV: Using VF 4 to build VPlans. 10@arr2 = external global [8 x i32], align 16 11@arr = external global [8 x [8 x i32]], align 16 12 13; Function Attrs: norecurse nounwind uwtable 14define void @foo(i32 %n) { 15entry: 16 br label %for.body 17 18for.body: ; preds = %for.inc8, %entry 19 %indvars.iv21 = phi i64 [ 0, %entry ], [ %indvars.iv.next22, %for.inc8 ] 20 %arrayidx = getelementptr inbounds [8 x i32], ptr @arr2, i64 0, i64 %indvars.iv21 21 %0 = trunc i64 %indvars.iv21 to i32 22 store i32 %0, ptr %arrayidx, align 4 23 %1 = trunc i64 %indvars.iv21 to i32 24 %add = add nsw i32 %1, %n 25 br label %for.body3 26 27for.body3: ; preds = %for.body3, %for.body 28 %indvars.iv = phi i64 [ 0, %for.body ], [ %indvars.iv.next, %for.body3 ] 29 %arrayidx7 = getelementptr inbounds [8 x [8 x i32]], ptr @arr, i64 0, i64 %indvars.iv, i64 %indvars.iv21 30 store i32 %add, ptr %arrayidx7, align 4 31 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 32 %exitcond = icmp eq i64 %indvars.iv.next, 8 33 br i1 %exitcond, label %for.inc8, label %for.body3 34 35for.inc8: ; preds = %for.body3 36 %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1 37 %exitcond23 = icmp eq i64 %indvars.iv.next22, 8 38 br i1 %exitcond23, label %for.end10, label %for.body, !llvm.loop !1 39 40for.end10: ; preds = %for.inc8 41 ret void 42} 43 44!1 = distinct !{!1, !2} 45!2 = !{!"llvm.loop.vectorize.enable", i1 true} 46